Spraying apparatus



Feb. 4, 1930. E. G. GREsHAM SPRAYING APPARATUS Filed Jan. 5. 1926 2sheets-smet 1 im /5 A\ v 9. u.. o Y ,A 5 5 6 6 o C @a c N/ Y.

Feb. 4, 1930.

E. G. GRESHAM s-PRAYING APPARATUS Filed Jan. 5, 1926 2 sneetsl-sneet '2'Patented Feb. 4, 1930 ERNESTy eno'oME GRESHAM, orl AUCKLAND, NEWzEArmiank SPRAYING APPARATUS Appcaton filed January 5, 1926, Serial No.79,400, and in New Zealand February 5, 1925.

This inventionrelatesto improvements in spraying apparatus. The objectaimed at by this invention is to effect improvements in the constructionof such apparatus whereby greater efficiency, economy and ycertainty ofv'y action'are secured. y

VThe invention comprises a timing gear f completecausing the uncoveringor' small [ports which allow ka sudden rush of water l0 past a speciallydesigned valve which is lifted and shuts off the water from thatparticular-sprayer and opens the water to the next sprayer of theseries, a rotationpulsator, a

pulsator Outlet so arranged that the exhaust water is directed on to themain stream from a jet so as to break it up suficiently to water theground between the sprayer and where thefstream would naturally fall,levers yby means of whichithe rotation of the sprayer is reversed,repeat mechanism by which lthe number of repeats is controlled and thewater is finally shut'o, and an arrangement ofy stops for the timingmechanism when afsprayf fr er is used revolving onlyinfsemicircles.

In the accompanying drawings illustratling the invention, Figurel is asectional elevation'ofa sprayer, Figure 2ris a sectional elevation ofthe pulsator at the in posi- Y .tion,`Figure -3is a sectional plan Viewof Figure 1 online A-B, Figure 1, Figure 4 is a plan view of the quickaction valve shown on Figure 5, Figure 5 is an elevation of the quickaction yvalve and the repeat mechanism, Figure 6 is a partialoppositeside 3 f,

elevation to that shown in Figure 1, Figure 7 isa partial perspectiveView of notched portion which takes the place of spiral thread onthe topof the kjet body when reverse 0' mechanism is used, Figure 8 is asectional plan view of Figure17, Figure 9 is an elevation' of one oftherotating mechanism ratchets, Figure 10 is a sectional plan on line A A-Bof Figure 9,`Figure 10A is a detail sectional view of the same, Figure11 is aperdetail sectional View of :the valve 92 and its connections.

The sprayersr 1, see Figures 1, 2, 3, and 6, comprise a centre column 2having an internal thread 3, a toothed portion 4, with stop pin holes 5,a bore 6, large ports 7, small ports 8, a thread 9, and a taper seat 10.

Fitting over the centre column 2 there is the jet body 11 provided witha taper bore 12 'which iit-s on the taper seat 10 of the said column 2in such a manner as to be rotatable thereon, the jet body 11 beingprovided with a spiral screw 13, a jet supply pipe 14, a removable jet15, the jet body pulsator 16 and an extension 17 to support the jet bodyrotating mechanism 18.

The pulsator 16 comprises a cylindrical box 19l having a tangentialcylinder 20, an inlet jet 21 from thesupply pipe14, and an outlet- 22. yv

The cylindrical box 19 has a central boss 23, see Figure 3, on which reeto turn thereon is a rocker 24 having attached thereto a pin 25 and astrip of flat exible material such as leather 26 to act as a valve, anotcih 27 being cut in the rocker 24 to allow a stop pin 28 fastened tothe box 19 to limit the motion of the said rocker 24 by coming incontact with shoulders 29 and 30 formed by the notch 27.

boss 23 and is free to turn therein', the crank! web 32and pin 33 beingplaced over the rocker 24 butin no way connected thereto except bytension spring 34 connecting the crankpin 33 and the rocker pin 25. Aconnecting rod 35 havingv a projection 36 passes between crank pin 33and the pin 37 of a piston rod 38 on which is mounted piston 39insidetangential cylinder 20.

The piston rod 38 passes out of the cylinder 20 through gland nut 40 theend having attached thereto a cross head 41 to which is fittedaconnecting rod 42.

A. tension spring 43 fastened between connecting rod projection 36 andthe box 19 tends to keep the piston 39 atthe in posi- 9 worm 45 in gearwith the toothed portion i 4 of the centre column 2, the said worm 45being mounted on a shaft 46 slidably and revolvably mounted inthe'extension 17 of the jet body 11 and an extended support 47.

The shaft 46 has a grooved portion 48 and two pins 49 and 50 attachedtheretothe pin 49 passing into a slotted hole 51 ofthe worm 45 and thepin 50 into either recesses 52 or 53 of ratchets 54 and 55 respectivelymounted on the shaft 46.

The ratchets 54 and 55, see Figures y9 and pin 49 being'able to slidewithin the slotted y vhole'51 ofthe worm k45 which is forced toalwaysturnwith'the shaft-46. VEngaged inthe ratchets 54 and 55 v (whichhave their teeth facin gin opposite directions) thereare pawls 56 and 57respectively pressed inwardly by a. tensionv spring 58, the pawls 56 and57 vbeing attached to one end of a link 59 swivelledon a pin 60`attached to a boss 61 of the jet body 11, the-connecting'rod v42passingbetween the crossl head-'41 and the opposite end'of the link59-to which-the pawls 56rand 57 are fastened.

At the grooved portion 48 of the shaft 46 there is the mechanismforImaking the shaft 46 slide backwards and forwards so that the pinfwillvpass between recesses 52 and 53 of ratchets 54 and 55 and take uptheir opposite` rotations; j

This mechanism comprises a lever 62 swivelled on pin 63 havingy a springpin'64 at its outer end and an engaging pin 65 at its other endpassinginto the grooved'shaft portion 48. y .K Also swivelledon'pin 63 there isanother v lever-66 `(between stop pinsv67 and 68) -provided with aspringpin 69jfrom which a tension spring 7 Opasses to the spring pin 64of-.the lever 62. Y A,

Fitting into the bore 6,' see Figure 1,' yof the center column 2 thereisa pistonY71-with a hollow piston rody 72 withvtwo oppositely Yplacedslots 73 the vupperend' ofy thefpiston rod being extended as at? 74A totake a tene sionk spring l75 which passes downl andis fastened to a lockpin 76 of coll-a'r77' on the thread 9 of centre column 2:

The extension74 also 'carries la-n arm 78 which` passes downwardlylandhas secured thereto by pin 79 asmall.engaging lever 80 free toliftbut unable to, droplower than the horizontal position.

A setscrew 81 is fastened neary the top of the centre column 2-and'passes throughy the slots 73of the hollow piston rod 72..

An adjustment setscrew 82 passes through the topy ofthe hollow pistonrod 72 and comes in contact with the setscrew 81.

A piece of pipe`83 is screwed into the in;V ternal thread 3 of thecenter column 2 and passes down and is attached to an upper seat casting84 screwed into the top of a check valve body 85..

valve seat 86 and a valve 87 provided with a lower seatin-g -surface 88andan upper seating surface 89 and notches 90 the upper seat The'checkvalve body 85 has the usual casting 84 having a seat 91 for the upperseating surface 89.

The repeat control mechanism, see Figures `4 and 5, comprises anordinary quick action stop valve 92having a side spindle 93 which f,opensand closes'the'valve 92 by .being turned a fewdegrees.l 1

To this spindle93 is fasteneda leverv 94 having an opentopped bucket V95(provided with a drain cock 96) attached atone end f valve 92. v

Mounted lon the spindle 93 and'free: t turn thereonthere is a ratchet 98prevented from working olf thesaid spindle 93by a collar 99.

The ratchet 98Ahas a raised projectionlOO between two Vof the teeth, theprojection 100 beingvof such aszefthat a notchY 101 of'apawl102Aa-ttachedto lever 94 will fit neatly thereon.- Y

' and al balance weight 97 atV theother, the

A pawl 103 attachedtothe body ofthe valve 92 also engages in the ratchet98'.'V `A strip*y spring 104 presses thelever pawl 102 into the ratchetA98.

A small pi-pe 105 supplies water from the last sprayer 1 of the seriesto the quick action valve 92 controlbucket 95,'fsee Figure 11, i

and the main 106 supplies water through main valve 107 to the sprayerpipe line 108.y

- For a reversing sprayer working in semi circles instead of a spiralscrew 13 on the jet body lltheref is a series ofgrooves 109, see Figure7, which haveslots Y11() left at opposite sidesof each alternategroove-109.

Pins lllfareplaced as desired in the stop pin holes '5, to comelincontact with the lever through the inlet jetf21`to'thecylindrical'box V19 of the pulsa-tor 16 pressure increasing lin thersaid'box 19 forcing the piston 39 out against the tension of spring 43.

.The piston .rod 38being forcedvout draws the connecting rod which movesthe crankypin 33 radially until the line of the spring 34 ,between thepin on the rocker 24and the vcrankpin33 is past the centre vof thecrank- .shaft 31, the spring4 34 then pulls the rocker 24 round untilrocker shoulder29 comes in contact withthe stop pin 28, the pulsatorbeing 21 allows the water under pressure `in box 19 toescape quickly,thepressure on the piston v39 thennot being sufficient toy resist thetension of the spring 43, the latter draws the piston 39 back again, theconnecting rod 35 forcing crankpin 33 round radially to its originalposition, the spring 34 having passed the Y crankshaft V31 center, therocker 24 is turned back to its original position with rocker shouldervagainst the stop pin 28,the valve 246 coveringthe outlet pipe 22.

`The pulsator 16-is then in the position as shown in Figure 2 allowingthe pressure in thebox 19 to again accumulate and move the piston 39again and so on.

This continual reciprocating motion of the y piston rod 38 is conveyedthrough crosshead 41andco'nnecting rod 42 to link 59 of the rotatingmechanism 18. y f @This link 59 rocks backwards'and forwards on pin 60and the pawls 56 and 57 also rock likewise ybut being engagedin'ratchets 54 andy 55 respectively, on the forward strokes of thepulsatofr 16 the pawl 56 .turns ratchet 54 one tooth in a clockwisedirection `and pawl 57 turns ratchet 55 `in an anti-clockwise direction.f

Considering Figure 3 the pin 50 .ofy shaft 46being in the recess53 ofthe ratchet k5,5 (between notches 55A, see Figures 9 andlO) theyanti-clockwise` rotation of the ratchet 55 is Vconveyed .to the shaft46 andthe pin 49 in the y latter causes the worm to also turn whichbeing in gear with the toothed portion 4 of.

ythe centre column 2 the jetfbody 11 and all its yattachedparts areforced to turn round on thefcenter column 2.y

' Pressurey of water inside the'bo're 6l ofthe i center column`2 tendsto force the piston 71 upwardly butis prevented from so doing by theengaging lever being engaged in the ,Y spiral thread 13.

. gaging leverl 8O stationary, as the jet body 11 turns the engaginglever 80 screws higher up the spiral thread 13 the piston 71 alsogetting higher up the bore 6 until engaging lever 80`is clear'of thespiral kthread 13 the piston is forced up the bore 6 uncovering theports 8 allowing water to flow therefrom.

As the increase of flow through the pipe 83 due to uncovering of ports 8has resulted ina drop of pressure but an increase of velocity throughthe notches of the valve 87 the latter is raised by the flow of water,untilthe ,upper seating surface 89 of the valve 87 comes in contact withthe seat 91 of the upper seat casting 84 the waterbeing then cut offfrom the jet 15 but able to flow through the check valve body 85, andthe pipe line 108 to the next sprayer l.

vThis next sprayer works in exactly the 4 same manner as above describedone sprayer 1 stopping and the following one connecting until all thesprayers have stopped and the water is opened to the pipe 105, seeFigure 11.

kThis pipe 105 allows water to flow into the bucket 95, see Figures 4, 5and 11 and the weight ofwater in the bucket becoming greater than thebalance weight 97 the bucket 95y descends and the lever 94 turns spindle93and the quick action valve 92 is closed.

Just prior to the closing of the stop valve 92 all the valves 87 of thesprayers 1 are in the upposition with 'their seatings 89 on seats 91kept in this position by the pressure of water. l

As each jet 15 is cut off from the pressure the tension spring 75between extension 74 and the lock pin 76 draws the piston rod 72 andpiston 71 downwardly into the bore 6 the levers`80 lift over thel spiralthreads 13 until the piston 71 is right down according to thevadjustment of setscrew 82 which can control the number of revolutionsof the jet body 11 until the relieving of pressure by the piston 71uncovering ports 8. Thus the timing mechanism is. again i position for anumber of revolutions of the jet body 11.

At the closing of the quick action valve 92 the pressure in the pipeline 108 drops and g the valves 87 in the sprayers 1 drop and the waternowing into the bucket 95 ceases.

As the water is slowly flowing out of the bucket 95 through the opencock 96 the weight of the balance weight 97 becomes greater than y,

the bucket 95 and the latter ascends turning the spindle 93 back andagain opening the quick action stop valve 92 the water again flowing tothe iirst sprayer 1 of the series and so onnuntil the Vwater again flowsfrom the small pipe to the bucket 95.

. This cycle of operation can be repeated as often as desired and thenstopped by means of th-e ratchet 98 fitted to the quick action valve 92spindle 93.

At .each down stroke of the bucket 95 the pawl 102 0n lever 94 turns theratchet 98 one tooth and on the up stroke of the bucket 95 the ratchet98 is prevented from turning back by the pawl 103 attached` to the valvebody 92 iso engagingin a tooth'of theratchet 98. the `lever Y pawl 102`slipping-over vthe teeth'. L f

Each tooth represents one .cycleV ofopera'- tion of the sprayers and theratchet 98 is turned round' until at oneofthe down strokes of the bucket95 the pawl 102is engaged in the tooth with the projection 100 betweenit and the next tooth. A

As this projection 100 fits into a notch v101 in the pawl 102, on thebucket95 attempting to ascend it is unable to do so because the pawl 102is `unable to slip over the ratchet 98 teeth and attempts to turn* theratchet 98 back'but is unable to do so because of the pawl 108 Thus thebucket 95 is kept locked'down and the quick action valve 92 closed untilthe pawl i102 is again released by the operator. who can control thenumber of cycles of vvspraying by turning the vratchet 98 backthedesired'number of teeth.

The operation above described is for a sprayer revolving'continually inthe one direction and the stop pins 111 arenot used.

For a sprayer l to sprayin a semiecircle two pins lll are fitted intothe holes 5 Aopposite each other and in place of the spiral thread 13there are a series oflgrooves 109,' see vFigurev7.

The sprayer l operates the-same as before described except that when thejet body 11 is revolving around the center column 2,l see Figure 3, thelever 66 comes .in contact with one of the'pins lll whichgraduallyforces itV radially away Vfrom the stop pin 68 against the tensionfofspring 70 until the line ofthe said spring 70 between spring pins64'and69 is past the center of the swivel pinGSVand-the y tension of thespring 70 pulls the lever 66 against stop pin'67 and the lever 62towards that side of the swivel pin 63..'

This movement'of the lever 62causesthe engaging pin 65 in the groovedportion 48 of shaft 46 to slide the latter inwardly andthe pin 50 passesfrom the recess 53 of ratchet 55V to the recess '52 of ratchet 54and asthe latter,v Y

is turning in the opposite directionA togthe' ratchet the shaft 46 yandworm45 also take up this reversed rotation so that the jet bodys llcommences to revolve in the oppositedi'recl tion until the lever 66COmesinCOntactwith the other pin 111 which forces it away 'fromy stoppin 67 over to stop pin 68 the shaft 46 being'caused to slide out againto, the'position shown in'Figure 3 the, rotation*thus/being" againreversed and so on. v

With this type of sprayer when the jetpbody 11 has turned halfarevolution theengaging lever comes under one of theslots 110 inthegrooves 109, see Figure 7, and the .pressure onA the piston 7l causesthe lever 8() 'to jump through the yslot 110 to the next groove uparound which it moves during the return half' revolution andumps throughthe slotlll) in the groove at the opposite side to the previousV slot110 the vrerersing'of'the'jet body taking the uppermost'slot llOand thepistonl is i free to lift and uncover the/ports 8-the operation l of.'the sprayer ib'eing :then-l justf as prepviouslyf'described; -l y 1.Aisprayerarranged for rotation, mecha# Y nism to rotate vthe sprayer,and pressure actuatedmeansconnectedto the sprayer and-ar'- ranged-toactuatesaid mechanism, said means comprising a bodyforming a chamberandacylinder and connected to and communicate ing'with the interior ofthesprayer, a pist-on inlsaid cylinder to which Ytherotating mechanism isconnected, a member arranged for oscillation in'said -chamber andprovided withl a valve, acrankmounted'at the axis of oscillas tion and of said oscillating member and for,`

VmovementA independentlyy thereof, alconnectl ing rod between saidvcrank andfsaid piston, a

yspring lconnected to said oscillating member andsaidfcrank'andshiftableto opposite sides ofthecenter of oscillation of said oscillating vmemberand a vspring exertingitsltension to impart instroke to said piston. e

- 2. A sprayer including" a.l central column and having a timingmechanism eomprisinga jet body mounted for Iturning movement on saidcolumn and provided withspiral threads, apistonf-valve in said r'columnmovable-in one direction by pressure of waterjin'v Sai'dcolev umn, aspring to move saidpistonval've'in the reverse directionl whenthejwaterv pressure die ininishesat'the endfof the stroke of'said pis-lton valve, and a memberengageable with the threads and connectedto Vsaidpiston valve to retard"V thev movementof the-*latter by water fpressure.

3. A sprayer including a centrall column' and havingjatimin `mechanismcomprisinga jet body mounted or turning lmovement on said columnandprovided with'spiral threads, a piston valvein said column .movableinon'e direction' by pressure ofiwaterin said column, a springto move`said :pist-on' valvev inthe re;l verse direction whenthe; water fpressure vdiminishesfatthe, end ofthe vstroke of' said Ap iston valve,andamemb'er"engageable withthe threads and connected to saidpiston valvetoy retard,l the movement of the latter'jby -water pressurejandmeans topredetermine the eX- Y tent of movement ofsaid piston valve.

InV testimonyk whereoffl aiiX 'my signature.

ERNEST GROOME GRESHAM

